PDF malware analysis — malicious · c086428e400c5c3b

MALICIOUS

PDF

83.6 KB Created: 2021-06-06 02:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 71393b3e3e3a137d110bbd6eef177b1d SHA-1: 15f9c35462f24327b48cb849cd5106e532d8bc89 SHA-256: c086428e400c5c3b6566315c4cc79cd74a6ad8ea2dcedb26440b5776f1db0a63

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://jacksth.ru/123?utm_term=bahubali+picture+all+song, which is likely part of the lure or distribution mechanism. The presence of embedded PDF objects and the overall structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://jacksth.ru/123?utm_term=bahubali+picture+all+song PDF link annotation
- https://roxopukerij.weebly.com/uploads/1/3/4/3/134396723/669496e5.pdfIn PDF document text
- https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/mejoxusova_xozegasipumatu_jifasoxakipi_gotufanokuzat.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380682/normal_5fcf3fbf03bf3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412378/normal_605850d456121.pdfIn PDF document text
- https://xesusufekab.weebly.com/uploads/1/3/4/8/134864027/fd31bf9d71.pdfIn PDF document text
- https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/zikepokabodiv_kibivitov_gidepebimel.pdfIn PDF document text
- https://dakokegeter.weebly.com/uploads/1/3/4/7/134723120/6350923.pdfIn PDF document text
- https://zonepebitebebo.weebly.com/uploads/1/3/4/3/134369254/52b6e189c.pdfIn PDF document text
- https://lekibuwowobaveg.weebly.com/uploads/1/3/5/2/135295955/1354712.pdfIn PDF document text
- https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/nimujotazasewi.pdfIn PDF document text
- https://nugaridepi.weebly.com/uploads/1/3/4/4/134474671/gulel.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472216/normal_604f40b473798.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/e338f1c1-7a6d-4d15-b00e-71b4fa0d48c6/29861326757.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/63b7dd2a-c635-4250-8cf6-4b4d3b4b6578/como_programar_el_control_de_megacable_para_apagar_la_tv_dta3.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e762d54-4d8e-415d-bb91-d756f69f01d2/vakibeditufalujopiluran.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b134585-bdf9-4783-ac73-fda999bee3e6/86254437222.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3cdd7a91-55a5-466f-a321-d5138122a199/pugopasudilanimojonavif.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b502e830-011c-4798-af06-9a6014cdaa1b/65525363556.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba4e3972-8121-49e4-b2ba-4fe4e8f8754f/sonic_the_hedgehog_colouring_pages.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/887fef1b-c49c-43ca-a456-612d0abd851d/repepapapiduwomozo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/da067f93-d8ba-499d-bb23-e38fa77bc08e/gukuvogogevivakepetow.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f316.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF316	5384 bytes
SHA-256: `1c5c87ed09da43f278638f6949fc5322858e9b22349b086a56842ee4dbf880a7`
`font_01_sfnt_off00010555.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10555	11352 bytes
SHA-256: `dff80484e1052ab0c1952bc4005c2a574d6f9ee9e828341909d85d686831b506`
`font_02_sfnt_off00012c6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C6C	16204 bytes
SHA-256: `c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449`

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